Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds value beyond that by explaining what the returned entities are (ready-made designs with fixed content) and what an agent can do next with them — open them in the design tool to customize and price. It does not mention result volume, pagination, or what happens with an unrecognized category slug.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Three short sentences, front-loaded with the resource and its examples, then the filter, then the follow-on workflow. Every sentence carries information; the only slightly promotional phrasing is 'free 3D design tool', which still conveys a useful downstream capability.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a single-optional-parameter read tool with no output schema, the description covers what is listed, how to narrow it, and what the results enable. What the template records actually contain (fields, images, IDs needed for the design tool) is left implicit, which is the main remaining gap given no output schema exists.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100% and the single parameter already documents 'Category slug to filter by; omit for all categories'. The description restates the optional filtering without adding slug format, valid values, or example slugs. Baseline 3 is appropriate when the schema fully carries the parameter semantics.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource ('List ready-made stamp design templates') and concretizes the resource with examples (poems, addresses, memorials). The three siblings (price calculation, inscription quoting, order tracking) are clearly different operations, so an agent can distinguish this without opening the schema. It stops short of explicitly contrasting itself with any alternative.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

Usage is only implied: an agent infers this is the browsing/discovery entry point because the description says templates are ready-made and can be customized. There is no explicit statement of when to call this versus quoting an inscription or calculating a price, and no mention of prerequisites. The 'Optionally filter by category' clause is parameter guidance, not tool-selection guidance.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.